AirHint found the following cheapest return flights from Denver (DEN) to Keflavik (KEF) in January 2026 (see full year).

Return flights

23 Jan - 31 Jan	Icelandair	direct
21 Jan - 25 Jan	Icelandair	direct
06 Jan - 13 Jan	Icelandair	direct
08 Jan - 15 Jan	Lufthansa
07 Jan - 14 Jan	Finnair
09 Jan - 16 Jan	Scandinavian Airlines
05 Jan - 12 Jan	Icelandair

Also check the deals for one-way flights from Denver to Keflavik in January.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Denver to Keflavik in January from 382€

Return flights